public class Example5_3 {
	public static void main(String args[]) {
	       	CheapGoods cheapGoods=new CheapGoods();
	       	//cheapGoods.weight=198.98; 是非法的，因为子类对象的weight已经是int型
		 cheapGoods.newSetWeight(198);
       		 System.out.println("对象cheapGoods的weight的值是:"+cheapGoods.weight);
  		 System.out.println("cheapGoods用子类新增的优惠方法计算价格："+ cheapGoods.newGetPrice());
		 cheapGoods.oldSetWeight(198.987); //子类对象调用继承的方法操作隐藏的double型变量weight
        	 System.out.println("cheapGoods使用继承的方法（无优惠）计算价格："+cheapGoods.oldGetPrice());
	}                                                                     
}
